SE8003864L - DEVICE FOR FEATING SIGNALS TO A PHONE LINE - Google Patents

DEVICE FOR FEATING SIGNALS TO A PHONE LINE

Info

Publication number
SE8003864L
SE8003864L SE8003864A SE8003864A SE8003864L SE 8003864 L SE8003864 L SE 8003864L SE 8003864 A SE8003864 A SE 8003864A SE 8003864 A SE8003864 A SE 8003864A SE 8003864 L SE8003864 L SE 8003864L
Authority
SE
Sweden
Prior art keywords
amplifier
signals
feating
circuits
line control
Prior art date
Application number
SE8003864A
Other languages
Unknown language ( )
Swedish (sv)
Inventor
F A C M Schoofs
Original Assignee
Philips Nv
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Nv filed Critical Philips Nv
Publication of SE8003864L publication Critical patent/SE8003864L/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H04M19/005—Feeding arrangements without the use of line transformers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Amplifiers (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

Arrangement for applying signals to a two-wire telephone line, comprising two line control circuits each comprising a fed-back amplifier circuit. According to the invention the amplifier circuits are constructed from an input stage constituted by an operational amplifier, a transistor arranged as a voltage amplifier (intermediate stage), and a power output stage which is in the form of a push-pull amplifier. The line control circuits can either receive the control signals with an opposite polarity or they can both receive the same control signal, one line control circuit being used as an inverting and the other as a non-inverting amplifier.
SE8003864A 1979-05-28 1980-05-23 DEVICE FOR FEATING SIGNALS TO A PHONE LINE SE8003864L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7904159A NL7904159A (en) 1979-05-28 1979-05-28 DEVICE FOR SUPPLYING SIGNALS TO A TELEPHONE LINE.

Publications (1)

Publication Number Publication Date
SE8003864L true SE8003864L (en) 1980-11-29

Family

ID=19833256

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8003864A SE8003864L (en) 1979-05-28 1980-05-23 DEVICE FOR FEATING SIGNALS TO A PHONE LINE

Country Status (11)

Country Link
US (1) US4310733A (en)
JP (1) JPS55161457A (en)
AU (1) AU534433B2 (en)
BE (1) BE883490A (en)
CA (1) CA1143494A (en)
DE (1) DE3019761C2 (en)
FR (1) FR2458183B1 (en)
GB (1) GB2051521B (en)
IT (1) IT1130749B (en)
NL (1) NL7904159A (en)
SE (1) SE8003864L (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3142201C2 (en) * 1981-01-23 1984-02-23 Mitel Corp., Kanata, Ontario Hybrid circuit for a telecommunication system, in particular a telephone system
NL8204377A (en) * 1982-11-12 1984-06-01 Philips Nv SUBSCRIPTION CIRCUIT FOR A TELEPHONE NETWORK.
FR2564678B1 (en) * 1984-05-18 1986-09-12 Thomson Csf Mat Tel SUBSCRIBER CIRCUIT LINK INTERFACE FOR TELEPHONE SWITCH
JPS60253364A (en) * 1984-05-30 1985-12-14 Fujitsu Ltd Internal termination type power feed circuit
US6678360B1 (en) 1985-07-10 2004-01-13 Ronald A. Katz Technology Licensing, L.P. Telephonic-interface statistical analysis system
CA1272318A (en) * 1986-10-20 1990-07-31 Kenji Takato Integrated ringing circuit and a ring trip circuit for the same
WO1993020646A1 (en) * 1992-04-01 1993-10-14 Siemens Aktiengesellschaft Combined supply voltage connection and call a.c. voltage generator and connection for analog telephone receiver stations in extension installations
US5600713A (en) * 1994-11-15 1997-02-04 Advanced Micro Devices, Inc. On-board ring signal generator
US6137189A (en) * 1999-07-30 2000-10-24 Intersil Corporation Line circuit apparatus for supplying power to a telephone set in telecommunication systems

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064377A (en) * 1976-03-11 1977-12-20 Wescom Switching, Inc. Electronic hybrid and hybrid repeater
US4041252A (en) * 1976-06-07 1977-08-09 North Electric Company Transformerless two-wire/four-wire hybrid with DC sourcing capability
FR2363952A1 (en) * 1976-09-03 1978-03-31 Thomson Csf TELEPHONE LINE CIRCUIT
GB1527293A (en) * 1977-04-21 1978-10-04 Garwell K Composite collector load for class a semiconductor amplifier
US4113996A (en) * 1977-05-20 1978-09-12 Bell Telephone Laboratories, Incorporated Voltage controlled current sources for active hybrid circuit
US4192978A (en) * 1978-02-27 1980-03-11 Vincent Ogden W Operational amplifier hybrid system

Also Published As

Publication number Publication date
DE3019761C2 (en) 1983-12-22
AU5881280A (en) 1980-12-04
IT1130749B (en) 1986-06-18
GB2051521A (en) 1981-01-14
FR2458183A1 (en) 1980-12-26
US4310733A (en) 1982-01-12
FR2458183B1 (en) 1986-04-18
AU534433B2 (en) 1984-01-26
NL7904159A (en) 1980-12-02
BE883490A (en) 1980-11-27
JPS55161457A (en) 1980-12-16
IT8022303A0 (en) 1980-05-23
DE3019761A1 (en) 1980-12-04
CA1143494A (en) 1983-03-22
GB2051521B (en) 1983-03-16

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